gatchat: Add support for slave chat instances

This adds support to assign a slave chat instance to an existing chat
instance. The slave chat is now additionally bound by the lifetime of
its master chat instance.

In case the master is cloned, the slave chat instance will also be
cloned as well.

With this it is possible to suspend the master while still have an
active slave for notifications or extra commands.

1 files changed, 31 insertions, 0 deletions

diff --git a/gatchat/gatchat.c b/gatchat/gatchat.c
index d05f4668..f3bd3ec6 100644
--- a/gatchat/gatchat.c
+++ b/gatchat/gatchat.c
@@ -105,6 +105,7 @@ struct _GAtChat {
 	gint ref_count;
 	struct at_chat *parent;
 	guint group;
+	GAtChat *slave;
 };
 
 struct terminator_info {
@@ -1304,9 +1305,36 @@ GAtChat *g_at_chat_clone(GAtChat *clone)
 	chat->ref_count = 1;
 	g_atomic_int_inc(&chat->parent->ref_count);
 
+	if (clone->slave != NULL)
+		chat->slave = g_at_chat_clone(clone->slave);
+
 	return chat;
 }
 
+GAtChat *g_at_chat_set_slave(GAtChat *chat, GAtChat *slave)
+{
+	if (chat == NULL)
+		return;
+
+	if (chat->slave != NULL)
+		g_at_chat_unref(chat->slave);
+
+	if (slave != NULL)
+		chat->slave = g_at_chat_ref(slave);
+	else
+		chat->slave = NULL;
+
+	return chat->slave;
+}
+
+GAtChat *g_at_chat_get_slave(GAtChat *chat)
+{
+	if (chat == NULL)
+		return NULL;
+
+	return chat->slave;
+}
+
 GIOChannel *g_at_chat_get_channel(GAtChat *chat)
 {
 	if (chat == NULL || chat->parent->io == NULL)
@@ -1361,6 +1389,9 @@ void g_at_chat_unref(GAtChat *chat)
 	if (is_zero == FALSE)
 		return;
 
+	if (chat->slave != NULL)
+		g_at_chat_unref(chat->slave);
+
 	at_chat_cancel_group(chat->parent, chat->group);
 	g_at_chat_unregister_all(chat);
 	at_chat_unref(chat->parent);